we are given

For finding inflection point, we will find second derivative


now, we can find derivative again


now, we can set it to 0
and then we can solve for x

we get

we know that inflection point is a point where concavity changes
so, we will draw a number line and locate x=-7/4
and then we can find sign of second derivative on each interval
Concave up interval:

Concave down interval:

Since, concavity changes at x=-7/4
So, there will be inflection point at x=-7/4
now, we can find y-value


So, the inflection point is
..............Answer