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How do i solve a 2 variable polynomial over 1 variable

So i have a polynomial over 2 variables:

R.<X, Y> = GF(8009)[]
Phi = -X^2*Y^2 + X^3 + 1488*X^2*Y + 1488*X*Y^2 + Y^3 \
    - 162000*X^2 + 40773375*X*Y - 162000*Y^2 \
    + 8748000000*X + 8748000000*Y - 157464000000000

I want to know for what Y values the polynomial has a solution with X = 33. I've tried using the solve method:

Phi(33, Y).roots(Y)

But this yields the error

AttributeError: 'sage.rings.polynomial.multi_polynomial_libsingular.MPolynomial_libsingular' object has no attribute 'roots'

I also tried the following:


It yields the error

TypeError: number of arguments does not match number of variables in parent

So what is the correct way to do this?