chances of getting a bid

What are my chances of getting in an Ole Miss sorority? I'm from a private high school in Memphis, 3.6 gpa, and am a one generation Phi Mu legacy (not with Ole Miss however). I would consider myself outgoing but I do not know many other girls already in a sorority there except a few. Will it still be very hard for me to get a bid? On average are there a lot of girls who don't get bids? Also, any advice on how to better my chances?