Find the Sum of the Series $\sum _ { n = 0 } ^ { \infty } \frac { ( - 1 ) ^ { n } \pi ^ { 2 n + 1 } } { 3 ^ { 2 n } ( 2 n + 1 ) ! }$

Find the sum of the series $\sum _ { n = 0 } ^ { \infty } \frac { ( - 1 ) ^ { n } \pi ^ { 2 n + 1 } } { 3 ^ { 2 n } ( 2 n + 1 ) ! }$ .