$5/10 - Weird flopspot against passive villain

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Villain has been passive throughout the session and im not sure what to do on the flop here. Folding feels so meh. Guess I just have to shove here even though his raise looks so strong?

Prima Network No-Limit Hold'em, $10.00 BB (6 handed) Hand History converter Courtesy of PokerZion.com

SB ($1581.00)
BB ($2066.00)
UTG ($1145.00)
Hero ($1515.00)
CO ($1000.00)
Button ($1022.00)

Preflop: Hero is MP with A[[img]/images/graemlins/spade.gif[/img]], Q[[img]/images/graemlins/spade.gif[/img]].
<font color="Gray">1 fold</font>, <font color="Red">Hero raises to $40</font>, <font color="Gray">1 fold</font>, Button calls $40, <font color="Gray">2 folds</font>.

Flop: ($95) 5[[img]/images/graemlins/spade.gif[/img]], 4[[img]/images/graemlins/spade.gif[/img]], 3[[img]/images/graemlins/heart.gif[/img]] <font color="Blue">(2 players)</font>
<font color="Red">Hero bets $70</font>, <font color="Red">Button raises to $305</font>, Hero?? [img]/images/graemlins/confused.gif[/img]