For complete combustion of methanol

CH₃OH(I) + ${3 \over 2}$O₂(g) $\to$ CO₂(g) + 2H₂O(I)

the amount of heat produced as measured by bomb calorimeter is 726 kJ mol^$-$1 at 27$^\circ$C. The enthalpy of combustion for the reaction is $-$x kJ mol^$-$1, where x is ___________. (Nearest integer)

(Given : R = 8.3 JK^$-$1 mol^$-$1)