It's really hard to give you specific advice. We don't know you, on here or in real life. We don't know the sororities. We don't know why you were cut (no one but the members of those sororities do). It could be a million things- grades, lack of activities, being quiet, or having a booger in your nose throughout all of recruitment (just trying to be lighthearted
) Or maybe there were just a lot of fantastic girls rushing- they may have liked you, but maybe you didn't stand out. Maybe you didn't fill a "need" of the house (some groups use needs as a rush indicator- say they need better grades in the house, or more social people, etc.). No one knows, it's all conjecture.
My best advice would be to try to get to know some of the girls in the houses outside of the rush atmosphere and see where to go from there.