Let $[ t ]$ denote the greatest integer $\leq t$. If the constant term in the expansion of $\left( 3 x ^ { 2 } - \frac { 1 } { 2 x ^ { 5 } } \right) ^ { 7 }$ is $\alpha$ then $[ \alpha ]$ is equal to $\_\_\_\_$
Let $[ t ]$ denote the greatest integer $\leq t$. If the constant term in the expansion of $\left( 3 x ^ { 2 } - \frac { 1 } { 2 x ^ { 5 } } \right) ^ { 7 }$ is $\alpha$ then $[ \alpha ]$ is equal to $\_\_\_\_$