4 bet AQ in blind battle, spew?

[Miklan300]

Villian is running 21/19, and im probably a little less, maybe 20/15. Hes been 3 betting me a decent amount, and Ive been folding for the most part. There have not been any 4 bets from either of us yet.

I understand calling is standard here, but AQ is not really a hand I want to play OOP for a big pot against a good TAG. I 4 bet here with the intention of calling a shove getting over 2.5 to 1, and probably check folding flop if he calls unless i hit something niiiice.
Anyone like this play, or am I just spewing here?

PokerStars No-Limit Hold'em, $2 BB (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($206)
UTG ($84)
Button ($193.30)
Hero ($474.65)

Preflop: Hero is SB with A[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $7</font>, <font color="#CC3333">BB raises to $22</font>, <font color="#CC3333">Hero raises to $75</font>

[carnivalhobo]

after a few 3bets this becomes pretty run of the mill, nh