mathematical optimization – maximize an expression within an interval.How?


I have tried to maximize this expression but in the interval -1<= x <=1 , but I can’t get the correct syntax

Maximize({(4 - 3 x - Sqrt(16 - 24 x + 9 x^2 - x^3))^(1/3) + (4 - 3 x + Sqrt(16 - 24 x + 9 x^2 - x^3))^(1/3), x, -1 <=x <= 1)

help me with the syntax