You played this too passively to tell what Villian has. I would raise his flop bet to around $30 and then if he calls, then I would be worried. If he 3-bets the flop, then fold. I dont like just calling the flop bet, because a large range of hands could bet the flop. I think 44, 55, 66, 77, 88, 99, TT are Villians most likely holdings once he pushed the turn. I think 77 is very very likely. Other than raising the flop, you played this hand sound.