#### Answer

Refer to the blue graph below.

#### Work Step by Step

RECALL:
The function $y=-f(x)$ involves a reflection about the $x$-axis of the parent function $f(x)$.
The parent function of the given function is $y=x^3$.
The graph of the given function involves a reflection about the x-axis of the parent function $y=x^3$.
Thus, to graph the given function:
(1) Graph the parent function $y=x^3$ .
(Refer to the red graph in the attached image below)
(2) Reflect the parent function's graph about the x-axis. This can be done by changing each y-value of the points of the parent function to its opposite sign while keeping the value of the x-value of each point.
(Refer to the blue graph in the attached image above.)