I would fold the flop, The BB just check 3 bet the flop, he has a 7 here almost every time. Even if you somehow have the best hand and you make a bad fold on the flop, any K,Q or heart will likely kill your hand anyways. Given this flop action you will be behind to trips about 95% of the time, and the other 5% of the time when you some how do have the best hand on the flop, you will still be an underdog to have the best hand by the river. Obviously I made up these percentages but you get the idea. I think this is a clear fold.