Is this a good spot for a small river bluff

[Nicok7]

Vilain is a tricky aggressive regular. He can get out of line/float/craise with air and all the like. He probably sees me as a standart tag capable of the odd big move. I dunno lol. We haven't played together in a long time.

Party Poker - No Limit Hold'em Cash Game - $10/$20 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $3554.50
BB: $9577
UTG: $2361
MP: $3804.50
<font color="black">Hero (CO): $2017.50</font>
BTN: $720

<font color="black">Preflop:</font> Hero is dealt A[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/heart.gif[/img] (6 Players)
2 folds, <font color="red">Hero raises to $70</font>, BTN folds, SB calls $60, BB folds

<font color="black">Flop:</font> ($160) 2[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">SB bets $150</font>, Hero calls $150

<font color="black">Turn:</font> ($460) 4[img]/images/graemlins/diamond.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $400</font>, SB calls $400

<font color="black">River:</font> ($1260) 7[img]/images/graemlins/diamond.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $500</font>

-Preflop his range is pretty wide
-on the flop he would lead with air or a draw. Probably would check raise a strong hand
-the turn action shows that he is either calling light or drawing doesn't it?
-My line is coherent with not a lot i guess. I can definitly value bet thin and he knows it.

Do you just give up the river? seems like he has air often enough to me?