The standard entropy change for the reaction $4 \mathrm{Fe}(\mathrm{s})+3 \mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{Fe}_2 \mathrm{O}_3(\mathrm{~s})$ is $-550 \mathrm{JK}^{-1}$ at 298 K.
[Given : The standard enthalpy change for the reaction is $\left.-165 \mathrm{~kJ} \mathrm{~mol}^{-1}\right]$. The temperature in K at which the reaction attains equilibrium is _________. (Nearest Integer)