$11 NLTRN -Turn decision facing a big bet

[pokercurious]

10th hand - hand 1: I 3bet with AJs and he folded to my followthrough on flop. I've folded 3 SB's, raised one, he called, I cbet, he folded. He's raised all but one of his SB's.

B: 1,220
Hero (SB): 1,780

Pre-Flop: (30) Q[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/heart.gif[/img] dealt to Hero (SB)
<font color="red">Hero raises to 60</font>
<font color="red">BB raises to 100</font>
Hero calls 40

Flop: (200) 9[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">BB bets 200</font>
Hero calls 200

Turn: (600) 9[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/spade.gif[/img] [ 6[img]/images/graemlins/club.gif[/img] ] (2 Players)
<font color="red">BB bets 500</font>, Hero???

I didn't raise the flop because I didn't want to be in the unenviable position of facing a shove on that flop. (Perhaps I should have?) I just felt like I had a vulnerable made hand, but one that was made enough that it could withstand a lot of turns.

Frankly, I was hoping he'd shut down or bet smaller on the turn. The turn bet seems unreasonably large, so I think it could easily be AK, AJ, JJ, TT, 88 etc. Then again, it could also be 66, 77, 99, QQ+, AQ, KQ, QJ, Q9, 8T.

Looking back, the flop bet also seems like a scared bet. Not many $11 players are in the habit of putting big money in with the best of it on the flop.

So is this a fold? Or is it a shove?