NL50 JJ UTG vs decent opponent flop 733 rainbow

[toxzen]

Villian is 22/15/4 over 300 and seems to be a decent/agressive player. Pretty sure he repops me PF with QQ+. Played it as if he has 77. I guess he could have A3s. JJ,TT, 99, 88, 66 or bluff is also likely though right? How bad is river call? I don't know, this hand confused me. Help me out please.

Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

CO ($21.15)
Button ($35.15)
SB ($53.95)
BB ($39.10)
Hero ($81.75)
UTG+1 ($19.75)
MP1 ($19.55)
MP2 ($5.20)
MP3 ($47.65)

Preflop: Hero is UTG with J[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">Hero raises to $1.75</font>, <font color="#666666">3 folds</font>, MP3 calls $1.75, <font color="#666666">4 folds</font>.

Flop: ($4.25) 7[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $3</font>, MP3 calls $3.

Turn: ($10.25) 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $7.5</font>, <font color="#CC3333">MP3 raises to $15</font>, Hero calls $7.50.

River: ($40.25) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP3 bets $16</font>, Hero calls $16.

Final Pot: $72.25