vector.push_back() improving performance

Question

Is there any way to improve the performance of this function? As I have to call it ~10-100M times for 1 calculation it's slowing down my program and most time has been lost in this line:

myHand_param.FinalHandVector.push_back((1 << static_cast<int>(std::ceil((i - 3.0) / 4.0))));

I know that the vector capacity should never exceed 5 but I don't know how to skip the boundary checking, tried to work with int* instead of vector but it didn't help as well.

    void CalculateKickers(Hand& myHand_param, int kickersNeeded)
{
    int countKickers{ 0 };

    for(int i = bits-1; i > 0 ; i--)
    {
        if (static_cast<std::bitset<bits>>(myHand_param.handMask)[i] == 1)
        {
            if (static_cast<std::bitset<1>>((static_cast<std::bitset<bits>>(myHand_param.FinalHandUsedCardFacesMask) >> i).to_ullong())== 0)
            {
                ++countKickers;
                myHand_param.FinalHandVector.push_back((1 << static_cast<int>(std::ceil((i - 3.0) / 4.0))));

                if (countKickers == kickersNeeded)
                {
                    i = 0;
                }
            }
        }   
    }
}