For complete combustion of methanol

${\mathrm{CH}}_3\mathrm{OH}\left(\mathrm{l}\right)+\frac{3}{2}{\mathrm{O}}_2( \mathrm{g})\to {\mathrm{CO}}_2( \mathrm{g})+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

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

(Given : $\mathrm{R}=8.3{\mathrm{JK}}^{-1}{ \mathrm{mol}}^{-1}$ )