Raise or call vs Twin on river

[Lyric]

Poker Stars
No Limit Holdem Ring game
Blinds: $10/$20
5 players
Converter

Stack sizes:
UTG: $2378
CO: $2940
Button: $2522
SB: $1900
Hero: $3751

Pre-flop: (5 players) Hero is BB with A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img]
UTG folds, <font color="#cc0000">CO raises to $80</font>, 2 folds, Hero calls.

Flop: 2[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/diamond.gif[/img] ($170, 2 players)
Hero checks, CO checks.

Turn: K[img]/images/graemlins/spade.gif[/img] ($170, 2 players)
<font color="#cc0000">Hero bets $160</font>, CO calls.

River: T[img]/images/graemlins/diamond.gif[/img] ($490, 2 players)
<font color="#cc0000">Hero bets $300</font>, <font color="#cc0000">CO raises to $760</font>