Don't do it. Its too late. If your app is already in, you are already in the decision cycle and they will think you are last-chancing it by trying to meet with them after-the-fact. They will see it as 'why didn't she take the time to meet with us before the app?' The portfolio is what they will look at mostly, and if you are in, you are in. If you are waitlisted, then by all means get in there and meet whoever you can, because sometimes if it is the right person, they will make a spot. That happened to two of my fellow MFA students last year. It is 100% best to meet with faculty before you apply, and then keep in touch. That way when your portfolio does come across their desk, they will remember you and have a better idea how to interpret your portfolio. Right now they are doing that with all the prospectives that did meet with them. I wasted a lot of time and money and energy meeting with faculty at tons of schools before applying with full intention of applying to them all. I ended up only applying to two of my choices....and got in at both...one I met with, one I didn't. The one I met with, I know I would not have gotten in had I not met with them before, because I was applying to an area that was new for me. Explaining my reasoning in person made a huge difference in them understanding why they would see my app. It worked!
Once you are in, or are waitlisted, or selected for interview, THEN meet with them because then they will want to talk to you.
Good luck!