For the reaction, $$aA + bB \to cC + dD$$, the plot of log k v/s $$\frac{1}{T}$$ is given below:

The temperature at which the rate constant of the reaction is $$10^{-4}$$ s$$^{-1}$$ is ______ K.
(Rounded-off to the nearest integer) [Given: The rate constant of the reaction is $$10^{-5}$$ s$$^{-1}$$ at 500 K.]